总述：本次共解1题。其中
           ☆算术计算1题

〖1/1算式〗
    作业：求算式 -90-arctan0.1×40-arctan0.01×40-arctan(1/0.375)*40-arctan(1/84.85)*40+arctan(1/3)*40+arctan(1/10.61)*40 的值.
    题型：数学计算
    解:
          -90-arctan0.1×40-arctan0.01×40-arctan(1/0.375)*40-arctan(1/84.85)*40+arctan(1/3)*40+arctan(1/10.61)*40
        =-90-arctan0.1×40-arctan0.01×40-arctan2.666667*40-arctan(1/84.85)*40+arctan(1/3)*40+arctan(1/10.61)*40
        =-90-arctan0.1×40-arctan0.01×40-arctan2.666667*40-arctan0.011786*40+arctan(1/3)*40+arctan(1/10.61)*40
        =-90-arctan0.1×40-arctan0.01×40-arctan2.666667*40-arctan0.011786*40+arctan0.333333*40+arctan(1/10.61)*40
        =-90-arctan0.1×40-arctan0.01×40-arctan2.666667*40-arctan0.011786*40+arctan0.333333*40+arctan0.094251*40
        =-90-0.099669×40-arctan0.01×40-arctan2.666667*40-arctan0.011786*40+arctan0.333333*40+arctan0.094251*40
        =-90-0.099669×40-0.01×40-arctan2.666667*40-arctan0.011786*40+arctan0.333333*40+arctan0.094251*40
        =-90-0.099669×40-0.01×40-1.212026*40-arctan0.011786*40+arctan0.333333*40+arctan0.094251*40
        =-90-0.099669×40-0.01×40-1.212026*40-0.011785*40+arctan0.333333*40+arctan0.094251*40
        =-90-0.099669×40-0.01×40-1.212026*40-0.011785*40+0.32175*40+arctan0.094251*40
        =-90-0.099669×40-0.01×40-1.212026*40-0.011785*40+0.32175*40+0.093973*40
        =-90-3.98676-0.01×40-1.212026*40-0.011785*40+0.32175*40+0.093973*40
        =-90-3.98676-0.4-1.212026*40-0.011785*40+0.32175*40+0.093973*40
        =-90-3.98676-0.4-48.48104-0.011785*40+0.32175*40+0.093973*40
        =-90-3.98676-0.4-48.48104-0.4714+0.32175*40+0.093973*40
        =-90-3.98676-0.4-48.48104-0.4714+12.87+0.093973*40
        =-90-3.98676-0.4-48.48104-0.4714+12.87+3.75892
        =-93.98676-0.4-48.48104-0.4714+12.87+3.75892
        =-94.38676-48.48104-0.4714+12.87+3.75892
        =-142.8678-0.4714+12.87+3.75892
        =-143.3392+12.87+3.75892
        =-130.4692+3.75892
        =-126.71028
    答案:-90-arctan0.1×40-arctan0.01×40-arctan(1/0.375)*40-arctan(1/84.85)*40+arctan(1/3)*40+arctan(1/10.61)*40=-126.71028
    注：弧度制

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